Insulator.



l :UNiTED sTAri-is 'PATENT OFFICE.

KARL A. SIMMON, F EDGEWOOD PARK, PENNSYLVANIA, v.ASSIGNOR T0WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION 0FPENNSYLVANIA.

' INSULATOR.

To all whom t may concern.'

Beit known that I, KARL A. SIMMON, a citizen ofthe United States, and aresident of Edgewood Park, in the county of Allegheny and State ofPennsylvanimhave invented a new and useful Improvement in tween thevarious conducting membersy Insulators, of which the following is aspecication.- Y c My invention relates to electricalinsulators andparticularly to'strain insulators.

One object of my invention is to provide a strain insulator which willwithstand high-potential stresses without rupture of the insulatingmaterial embodied therein and which will be inexpensive to manufacture.i U y Another object of my invention isto provide an insulator in lwhichthe gaps be- -l which may be -assembled together to provideinsulatorsfor various voltages.

Heretofore, insulators have been provided which had a plurality of gapsin series-cire cuit relation between the conducting members embodied inthe insulator but such inl sulators havebeen relatively expensive tomanufacture, and the insulating material 'connecting the parts of theinsulator has been subjected to a tensilestress when force was appliedto the insulator.

My minvention provides an' insulator in which the gaps' between theconducting members embodiedin the insulator are arranged inaseries-circuit relation. Fur# thermore, the ,parts of the insulator areso, designed that various numbers of parts may be assembled to provideinsulators for various voltages.

Figure 1 of the accompanying drawing is a sectional view of an insulatorconstructed inilaccordance with my invention,- and Fig. 2 is a sectionalview of a modifica-l y tion of my invention. Y

The insulator shown in the drawing comprises connecting members 1 and 2,`a member 3 interposed between the connecting members 1 and 2, clampingmembers4 and 5, insulation 6, and a protective casing 7 Specification ofLetters Patent. Patented NOV. 13, 1917. Application filed December 9,1916. Serial No. 136,013.

The connecting members 1 and 2 are severally provided with enlargedinner end portions 10 which are lincased in insulation 11, and with athreaded socket 12'by means of which the connecting members may besecured` to other insulators or to conductors which are electricallyseparated by the insulator. The member 3, which may be cylindricalinform, is provided with enlarged end portions 13 vand 14 which are alsore.

spectively incased in insulation- 11. The members 1,l 2 and 3 areassembled in endto-end relation, andthe adjacent enlarged insulatedportions 10'and13 and 10 and 14 are respectively incased by members 4and 5 which clamp the members 1. and 3, and 2 and 3 together into arigid unit. An insulating disk 15 is provided to electrically separatethe clamping members 4 and 5. A groove 16 is provided in the inner sideof the disk 15 in orderto increase the creepage distance between members4 and 5. The assembled insulator parts 1, 2, 3, 4, and 5 are embedded inthe insulation and are (surrounded by the protective -insulating casing7 to mechanically protect the insuylator parts.

It will be understood, from the above de-V scription, that the variousparts constituting the insulator will severally constitute condenserplates and will` distribute the voltage stress' which is applied acrossthe members 1 and 2. It should also be noted that the member 3 is ofsuch construction that any 'desired number of such members may beinterposed between the end-connecting members 1 and2 to provide aninsulator 'for any desired voltage. asillustrated in Fig. 2 of thedrawing. Thel incasing member 7 is not essential to the invention hereindisclosed but, when emploved, may be composed of porcelain or similarmaterial.

Although I have described a particular embodiment oi' my invention, itshould be understood that various modifications of the insulator may beconstructed without `departing from the spirit and scopeof my invention.I desire that only such limitations shall be imposed as are indicated inthe appended claims. y

. I claim las my invention: y

1. A unitary insulator comprising end` members each having an enlargedend portion, Aa metallic member interposed between said end members andinsulated therefrom,

andA insulated metallic means for clamping said members together.

2. -A unitary insulator comprising l, end members each having anenlarged end portion, a metallic member having enlarged ends andinterposed between said end members and insulated therefrom, and ametallic shell for incasing adjacent enlarged portions and clamping thesame together.

3. A. unitary insulator comprising end members each having an enlarged'end p0rtion, a metallicmember having enlarged ends and interposedbetween said end members and insulated therefrom, and insulated metallicmembers for respectively incasing each pair of adjacent enlarged endportions to clamp said memberstogether;

4. A unitary insulator. comprising conn'ecting members having enlargedinner end portion-s, an interposed member having enlarged ends, andincasing members for respectively clamping said end portions t0- gether,all of said members being embedded in insulating material 'and insulatedfrom all other of said members.

5. An insulator'comprising end members respectively having an enlargedend portion surrounded 'by insulating material, a member having enlargedends and'similarly in'- sulated, said members being assembled inend-toend relation, with said enlarged portions adjacent, and incasingmembers for clamping said adjacent enlarged portions together.

6. An insulator comprising end members.

respectively having an enlarged end portion surrounded `by insulatingmaterial, a member having enlarged ends and similarly insulated, saidmembers being assembled in end-to-end relation, with saidenlargedportions adjacent, and a clamping member for holding one pair ofsaid adjacent enlarged portions together.

7 An insulator comprising end members respectively having enlarged endportions surrounded by' insulating material, a mem-- ber having enlargedends and similarly insulated, said members beingl assembled inend-to-end relation, with said enlarged portions adjacent, and metallicmembers for respectively clamping said adjacent end portions together,said metallic members being embedded in insulating material. j

8. An insulator comprising end members respectively having enlarged endportions surrounded by insulating material, a member having enlargedends and similarly insulated, said `members being assembled inend-to-end relation,-with said enlarged portions adjacent, incasingmembers for clamping said adjacent enlarged portions together, -saidincasing members being embedded in insulation, and an insulating jacketsurrounding all of said members.

9. An insulator comprising end members respectively having enlarged endportions, a member having enlarged yends and inter- -posed between saidend members, said members being assembled 'with said enlarged portionsadjacent, an incasing member for clamping said adjacent enlargedportions together, and means' for insulating each of said members.

' l0. An insulator comprising metallic connecting member having anenlarged end portion, a member having enlarged ends, the enlargedportions of said members being insulated and assembled in end-to-endrelation, with the enlarged portions adjacent, a metallic member for.clamping said enlarged portions together, and insulating materialsurrounding all of said members.

11. An insulator comprising end members respectively having enlarged endportions, a member having enlarged ends and interposed between said endmembers, said members being assembled in end-toend relation, an incasingmember for clamping each pair of enlarged end portions together, aninsulating disk having a grooved inner surface and interposed betweensaid incasing members, and means for insulating each of said members.

In testimony whereof, Il have hereunto subscribed myk name this 24th dayof Nov. 1916.

KARL A. SIlWMON.

